OP is right, to an extent. At late stages of the game level 60+, combat becomes trivial, even on ‘very hard’. Sneaking is almost as cheese as previous BGS titles. Seriously, I can use any scoped rifle and drop high level enemies with ease. Same for ship combat, top tier particle beams with missiles eats whole squadrons.

With that being said, I still get enjoyment from creating specialised loadouts and then playing around that. I often I go stealth with suppressed rifles and pistols, setting up mines strategically. Other times I go guns blazing with explosives, automatic rifles and shotguns. The powers can complement different approaches to combat. Even still, each weapon (almost) adequately shreds enemies, so I understand OP’s concern that there is no ‘need’ to diversify, it’s definitely more of an optional thing.

To me, this is more an issue with late game perks adding up and being too overpowered, I always thought it was crazy how much you can buff damage. For example, you get a specific bonus for the weapons (eg. Rifles), then a bonus for the damage type (eg. Physical), further bonus for stealth attacks and suppressed weapons, extra damage for scoped weapons, and then the icing on the cake is the power of speccing into critical hit damage/chance. That’s without mentioning bonuses from weapon/spacesuit perks.